Cephalid Illusionist + Idris, Soul of the TARDIS + Memnarch + Psychic Battle

Mana needed: {2}{U}{U}{U}{R} plus enough mana to pay for commander tax if applicable

UR identity

Commander legal

The 4 combo pieces

What must be in place

The top card of your library has a higher mana value than the top cards of each opponent's library.
You have a way to choose one or more targets, as well as additional legal targets for that spell or ability.

How to execute it

  1. Activate Memnarch by paying {1}{U}{U}, causing Psychic Battle to become an artifact.
  2. Cast Idris either from your hand or from the command zone by paying {1}{U}{R} plus commander tax, if applicable.
  3. When Idris enters the battlefield, it triggers, exiling Psychic Battle until Idris leaves the battlefield.
  4. Choose any number of targets by any method.
  5. Idris triggers, causing each player to reveal the top card of their library and changing the target(s) of the spell or ability to Cephalid Illusionist.
  6. Cephalid Illusionist and Idris trigger.
  7. Resolve the Cephalid Illusionist trigger, causing you to mill three cards.
  8. Resolve the Idris trigger, causing each player to reveal the top card of their library and changing the target(s) of the spell or ability to any other target.
  9. Repeat from step 5.

What the combo produces